drivers/media/pci/ddbridge/ddbridge-main.c - linux/kernel/git/bpf/bpf - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * ddbridge.c: Digital Devices PCIe bridge driver
  *
  * Copyright (C) 2010-2017 Digital Devices GmbH
  *                         Ralph Metzler <rjkm@metzlerbros.de>
  *                         Marcus Metzler <mocm@metzlerbros.de>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 only, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/poll.h>
 #include <linux/io.h>
 #include <linux/pci.h>
 #include <linux/pci_ids.h>
 #include <linux/timer.h>
 #include <linux/i2c.h>
 #include <linux/swab.h>
 #include <linux/vmalloc.h>

 #include "ddbridge.h"
 #include "ddbridge-i2c.h"
 #include "ddbridge-regs.h"
 #include "ddbridge-hw.h"
 #include "ddbridge-io.h"

 /****************************************************************************/
 /* module parameters */

 #ifdef CONFIG_PCI_MSI
 #ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
 static int msi = 1;
 #else
 static int msi;
 #endif
 module_param(msi, int, 0444);
 #ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
 MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable, 1-enable (default)");
 #else
 MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable (default), 1-enable");
 #endif
 #endif

 /****************************************************************************/
 /****************************************************************************/
 /****************************************************************************/

 static void ddb_irq_disable(struct ddb *dev)
 {
 	ddbwritel(dev, 0, INTERRUPT_ENABLE);
 	ddbwritel(dev, 0, MSI1_ENABLE);
 }

 static void ddb_msi_exit(struct ddb *dev)
 {
 #ifdef CONFIG_PCI_MSI
 	if (dev->msi)
 		pci_free_irq_vectors(dev->pdev);
 #endif
 }

 static void ddb_irq_exit(struct ddb *dev)
 {
 	ddb_irq_disable(dev);
 	if (dev->msi == 2)
 		free_irq(pci_irq_vector(dev->pdev, 1), dev);
 	free_irq(pci_irq_vector(dev->pdev, 0), dev);
 }

 static void ddb_remove(struct pci_dev *pdev)
 {
 	struct ddb *dev = (struct ddb *)pci_get_drvdata(pdev);

 	ddb_device_destroy(dev);
 	ddb_ports_detach(dev);
 	ddb_i2c_release(dev);

 	ddb_irq_exit(dev);
 	ddb_msi_exit(dev);
 	ddb_ports_release(dev);
 	ddb_buffers_free(dev);

 	ddb_unmap(dev);
 	pci_set_drvdata(pdev, NULL);
 	pci_disable_device(pdev);
 }

 #ifdef CONFIG_PCI_MSI
 static void ddb_irq_msi(struct ddb *dev, int nr)
 {
 	int stat;

 	if (msi && pci_msi_enabled()) {
 		stat = pci_alloc_irq_vectors(dev->pdev, 1, nr,
 					     PCI_IRQ_MSI | PCI_IRQ_MSIX);
 		if (stat >= 1) {
 			dev->msi = stat;
 			dev_info(dev->dev, "using %d MSI interrupt(s)\n",
 				 dev->msi);
 		} else {
 			dev_info(dev->dev, "MSI not available.\n");
 		}
 	}
 }
 #endif

 static int ddb_irq_init(struct ddb *dev)
 {
 	int stat;
 	int irq_flag = IRQF_SHARED;

 	ddbwritel(dev, 0x00000000, INTERRUPT_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI1_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI2_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI3_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI4_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI5_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI6_ENABLE);
 	ddbwritel(dev, 0x00000000, MSI7_ENABLE);

 #ifdef CONFIG_PCI_MSI
 	ddb_irq_msi(dev, 2);

 	if (dev->msi)
 		irq_flag = 0;
 	if (dev->msi == 2) {
 		stat = request_irq(pci_irq_vector(dev->pdev, 0),
 				   ddb_irq_handler0, irq_flag, "ddbridge",
 				   (void *)dev);
 		if (stat < 0)
 			return stat;
 		stat = request_irq(pci_irq_vector(dev->pdev, 1),
 				   ddb_irq_handler1, irq_flag, "ddbridge",
 				   (void *)dev);
 		if (stat < 0) {
 			free_irq(pci_irq_vector(dev->pdev, 0), dev);
 			return stat;
 		}
 	} else
 #endif
 	{
 		stat = request_irq(pci_irq_vector(dev->pdev, 0),
 				   ddb_irq_handler, irq_flag, "ddbridge",
 				   (void *)dev);
 		if (stat < 0)
 			return stat;
 	}
 	if (dev->msi == 2) {
 		ddbwritel(dev, 0x0fffff00, INTERRUPT_ENABLE);
 		ddbwritel(dev, 0x0000000f, MSI1_ENABLE);
 	} else {
 		ddbwritel(dev, 0x0fffff0f, INTERRUPT_ENABLE);
 		ddbwritel(dev, 0x00000000, MSI1_ENABLE);
 	}
 	return stat;
 }

 static int ddb_probe(struct pci_dev *pdev,
 		     const struct pci_device_id *id)
 {
 	struct ddb *dev;
 	int stat = 0;

 	if (pci_enable_device(pdev) < 0)
 		return -ENODEV;

 	pci_set_master(pdev);

 	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
 		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
 			return -ENODEV;

 	dev = vzalloc(sizeof(*dev));
 	if (!dev)
 		return -ENOMEM;

 	mutex_init(&dev->mutex);
 	dev->has_dma = 1;
 	dev->pdev = pdev;
 	dev->dev = &pdev->dev;
 	pci_set_drvdata(pdev, dev);

 	dev->link[0].ids.vendor = id->vendor;
 	dev->link[0].ids.device = id->device;
 	dev->link[0].ids.subvendor = id->subvendor;
 	dev->link[0].ids.subdevice = pdev->subsystem_device;
 	dev->link[0].ids.devid = (id->device << 16) | id->vendor;

 	dev->link[0].dev = dev;
 	dev->link[0].info = get_ddb_info(id->vendor, id->device,
 					 id->subvendor, pdev->subsystem_device);

 	dev_info(&pdev->dev, "detected %s\n", dev->link[0].info->name);

 	dev->regs_len = pci_resource_len(dev->pdev, 0);
 	dev->regs = ioremap(pci_resource_start(dev->pdev, 0),
 			    pci_resource_len(dev->pdev, 0));

 	if (!dev->regs) {
 		dev_err(&pdev->dev, "not enough memory for register map\n");
 		stat = -ENOMEM;
 		goto fail;
 	}
 	if (ddbreadl(dev, 0) == 0xffffffff) {
 		dev_err(&pdev->dev, "cannot read registers\n");
 		stat = -ENODEV;
 		goto fail;
 	}

 	dev->link[0].ids.hwid = ddbreadl(dev, 0);
 	dev->link[0].ids.regmapid = ddbreadl(dev, 4);

 	dev_info(&pdev->dev, "HW %08x REGMAP %08x\n",
 		 dev->link[0].ids.hwid, dev->link[0].ids.regmapid);

 	ddbwritel(dev, 0, DMA_BASE_READ);
 	ddbwritel(dev, 0, DMA_BASE_WRITE);

 	stat = ddb_irq_init(dev);
 	if (stat < 0)
 		goto fail0;

 	if (ddb_init(dev) == 0)
 		return 0;

 	ddb_irq_exit(dev);
 fail0:
 	dev_err(&pdev->dev, "fail0\n");
 	ddb_msi_exit(dev);
 fail:
 	dev_err(&pdev->dev, "fail\n");

 	ddb_unmap(dev);
 	pci_set_drvdata(pdev, NULL);
 	pci_disable_device(pdev);
 	return -1;
 }

 /****************************************************************************/
 /****************************************************************************/
 /****************************************************************************/

 #define DDB_DEVICE_ANY(_device) \
 		{ PCI_DEVICE_SUB(DDVID, _device, DDVID, PCI_ANY_ID) }

 static const struct pci_device_id ddb_id_table[] = {
 	DDB_DEVICE_ANY(0x0002),
 	DDB_DEVICE_ANY(0x0003),
 	DDB_DEVICE_ANY(0x0005),
 	DDB_DEVICE_ANY(0x0006),
 	DDB_DEVICE_ANY(0x0007),
 	DDB_DEVICE_ANY(0x0008),
 	DDB_DEVICE_ANY(0x0009),
 	DDB_DEVICE_ANY(0x0011),
 	DDB_DEVICE_ANY(0x0012),
 	DDB_DEVICE_ANY(0x0013),
 	DDB_DEVICE_ANY(0x0201),
 	DDB_DEVICE_ANY(0x0203),
 	DDB_DEVICE_ANY(0x0210),
 	DDB_DEVICE_ANY(0x0220),
 	DDB_DEVICE_ANY(0x0320),
 	DDB_DEVICE_ANY(0x0321),
 	DDB_DEVICE_ANY(0x0322),
 	DDB_DEVICE_ANY(0x0323),
 	DDB_DEVICE_ANY(0x0328),
 	DDB_DEVICE_ANY(0x0329),
 	{0}
 };

 MODULE_DEVICE_TABLE(pci, ddb_id_table);

 static struct pci_driver ddb_pci_driver = {
 	.name        = "ddbridge",
 	.id_table    = ddb_id_table,
 	.probe       = ddb_probe,
 	.remove      = ddb_remove,
 };

 static __init int module_init_ddbridge(void)
 {
 	int stat;

 	pr_info("Digital Devices PCIE bridge driver "
 		DDBRIDGE_VERSION
 		", Copyright (C) 2010-17 Digital Devices GmbH\n");
 	stat = ddb_init_ddbridge();
 	if (stat < 0)
 		return stat;
 	stat = pci_register_driver(&ddb_pci_driver);
 	if (stat < 0)
 		ddb_exit_ddbridge(0, stat);

 	return stat;
 }

 static __exit void module_exit_ddbridge(void)
 {
 	pci_unregister_driver(&ddb_pci_driver);
 	ddb_exit_ddbridge(0, 0);
 }

 module_init(module_init_ddbridge);
 module_exit(module_exit_ddbridge);

 MODULE_DESCRIPTION("Digital Devices PCIe Bridge");
 MODULE_AUTHOR("Ralph and Marcus Metzler, Metzler Brothers Systementwicklung GbR");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION(DDBRIDGE_VERSION);
	// SPDX-License-Identifier: GPL-2.0
	/*
	* ddbridge.c: Digital Devices PCIe bridge driver
	*
	* Copyright (C) 2010-2017 Digital Devices GmbH
	* Ralph Metzler <rjkm@metzlerbros.de>
	* Marcus Metzler <mocm@metzlerbros.de>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* version 2 only, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/delay.h>
	#include <linux/slab.h>
	#include <linux/poll.h>
	#include <linux/io.h>
	#include <linux/pci.h>
	#include <linux/pci_ids.h>
	#include <linux/timer.h>
	#include <linux/i2c.h>
	#include <linux/swab.h>
	#include <linux/vmalloc.h>

	#include "ddbridge.h"
	#include "ddbridge-i2c.h"
	#include "ddbridge-regs.h"
	#include "ddbridge-hw.h"
	#include "ddbridge-io.h"

	/****************************************************************************/
	/* module parameters */

	#ifdef CONFIG_PCI_MSI
	#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
	static int msi = 1;
	#else
	static int msi;
	#endif
	module_param(msi, int, 0444);
	#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
	MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable, 1-enable (default)");
	#else
	MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable (default), 1-enable");
	#endif
	#endif

	/****************************************************************************/
	/****************************************************************************/
	/****************************************************************************/

	static void ddb_irq_disable(struct ddb *dev)
	{
	ddbwritel(dev, 0, INTERRUPT_ENABLE);
	ddbwritel(dev, 0, MSI1_ENABLE);
	}

	static void ddb_msi_exit(struct ddb *dev)
	{
	#ifdef CONFIG_PCI_MSI
	if (dev->msi)
	pci_free_irq_vectors(dev->pdev);
	#endif
	}

	static void ddb_irq_exit(struct ddb *dev)
	{
	ddb_irq_disable(dev);
	if (dev->msi == 2)
	free_irq(pci_irq_vector(dev->pdev, 1), dev);
	free_irq(pci_irq_vector(dev->pdev, 0), dev);
	}

	static void ddb_remove(struct pci_dev *pdev)
	{
	struct ddb dev = (struct ddb )pci_get_drvdata(pdev);

	ddb_device_destroy(dev);
	ddb_ports_detach(dev);
	ddb_i2c_release(dev);

	ddb_irq_exit(dev);
	ddb_msi_exit(dev);
	ddb_ports_release(dev);
	ddb_buffers_free(dev);

	ddb_unmap(dev);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
	}

	#ifdef CONFIG_PCI_MSI
	static void ddb_irq_msi(struct ddb *dev, int nr)
	{
	int stat;

	if (msi && pci_msi_enabled()) {
	stat = pci_alloc_irq_vectors(dev->pdev, 1, nr,
	PCI_IRQ_MSI \| PCI_IRQ_MSIX);
	if (stat >= 1) {
	dev->msi = stat;
	dev_info(dev->dev, "using %d MSI interrupt(s)\n",
	dev->msi);
	} else {
	dev_info(dev->dev, "MSI not available.\n");
	}
	}
	}
	#endif

	static int ddb_irq_init(struct ddb *dev)
	{
	int stat;
	int irq_flag = IRQF_SHARED;

	ddbwritel(dev, 0x00000000, INTERRUPT_ENABLE);
	ddbwritel(dev, 0x00000000, MSI1_ENABLE);
	ddbwritel(dev, 0x00000000, MSI2_ENABLE);
	ddbwritel(dev, 0x00000000, MSI3_ENABLE);
	ddbwritel(dev, 0x00000000, MSI4_ENABLE);
	ddbwritel(dev, 0x00000000, MSI5_ENABLE);
	ddbwritel(dev, 0x00000000, MSI6_ENABLE);
	ddbwritel(dev, 0x00000000, MSI7_ENABLE);

	#ifdef CONFIG_PCI_MSI
	ddb_irq_msi(dev, 2);

	if (dev->msi)
	irq_flag = 0;
	if (dev->msi == 2) {
	stat = request_irq(pci_irq_vector(dev->pdev, 0),
	ddb_irq_handler0, irq_flag, "ddbridge",
	(void *)dev);
	if (stat < 0)
	return stat;
	stat = request_irq(pci_irq_vector(dev->pdev, 1),
	ddb_irq_handler1, irq_flag, "ddbridge",
	(void *)dev);
	if (stat < 0) {
	free_irq(pci_irq_vector(dev->pdev, 0), dev);
	return stat;
	}
	} else
	#endif
	{
	stat = request_irq(pci_irq_vector(dev->pdev, 0),
	ddb_irq_handler, irq_flag, "ddbridge",
	(void *)dev);
	if (stat < 0)
	return stat;
	}
	if (dev->msi == 2) {
	ddbwritel(dev, 0x0fffff00, INTERRUPT_ENABLE);
	ddbwritel(dev, 0x0000000f, MSI1_ENABLE);
	} else {
	ddbwritel(dev, 0x0fffff0f, INTERRUPT_ENABLE);
	ddbwritel(dev, 0x00000000, MSI1_ENABLE);
	}
	return stat;
	}

	static int ddb_probe(struct pci_dev *pdev,
	const struct pci_device_id *id)
	{
	struct ddb *dev;
	int stat = 0;

	if (pci_enable_device(pdev) < 0)
	return -ENODEV;

	pci_set_master(pdev);

	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
	return -ENODEV;

	dev = vzalloc(sizeof(*dev));
	if (!dev)
	return -ENOMEM;

	mutex_init(&dev->mutex);
	dev->has_dma = 1;
	dev->pdev = pdev;
	dev->dev = &pdev->dev;
	pci_set_drvdata(pdev, dev);

	dev->link[0].ids.vendor = id->vendor;
	dev->link[0].ids.device = id->device;
	dev->link[0].ids.subvendor = id->subvendor;
	dev->link[0].ids.subdevice = pdev->subsystem_device;
	dev->link[0].ids.devid = (id->device << 16) \| id->vendor;

	dev->link[0].dev = dev;
	dev->link[0].info = get_ddb_info(id->vendor, id->device,
	id->subvendor, pdev->subsystem_device);

	dev_info(&pdev->dev, "detected %s\n", dev->link[0].info->name);

	dev->regs_len = pci_resource_len(dev->pdev, 0);
	dev->regs = ioremap(pci_resource_start(dev->pdev, 0),
	pci_resource_len(dev->pdev, 0));

	if (!dev->regs) {
	dev_err(&pdev->dev, "not enough memory for register map\n");
	stat = -ENOMEM;
	goto fail;
	}
	if (ddbreadl(dev, 0) == 0xffffffff) {
	dev_err(&pdev->dev, "cannot read registers\n");
	stat = -ENODEV;
	goto fail;
	}

	dev->link[0].ids.hwid = ddbreadl(dev, 0);
	dev->link[0].ids.regmapid = ddbreadl(dev, 4);

	dev_info(&pdev->dev, "HW %08x REGMAP %08x\n",
	dev->link[0].ids.hwid, dev->link[0].ids.regmapid);

	ddbwritel(dev, 0, DMA_BASE_READ);
	ddbwritel(dev, 0, DMA_BASE_WRITE);

	stat = ddb_irq_init(dev);
	if (stat < 0)
	goto fail0;

	if (ddb_init(dev) == 0)
	return 0;

	ddb_irq_exit(dev);
	fail0:
	dev_err(&pdev->dev, "fail0\n");
	ddb_msi_exit(dev);
	fail:
	dev_err(&pdev->dev, "fail\n");

	ddb_unmap(dev);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
	return -1;
	}

	/****************************************************************************/
	/****************************************************************************/
	/****************************************************************************/

	#define DDB_DEVICE_ANY(_device) \
	{ PCI_DEVICE_SUB(DDVID, _device, DDVID, PCI_ANY_ID) }

	static const struct pci_device_id ddb_id_table[] = {
	DDB_DEVICE_ANY(0x0002),
	DDB_DEVICE_ANY(0x0003),
	DDB_DEVICE_ANY(0x0005),
	DDB_DEVICE_ANY(0x0006),
	DDB_DEVICE_ANY(0x0007),
	DDB_DEVICE_ANY(0x0008),
	DDB_DEVICE_ANY(0x0009),
	DDB_DEVICE_ANY(0x0011),
	DDB_DEVICE_ANY(0x0012),
	DDB_DEVICE_ANY(0x0013),
	DDB_DEVICE_ANY(0x0201),
	DDB_DEVICE_ANY(0x0203),
	DDB_DEVICE_ANY(0x0210),
	DDB_DEVICE_ANY(0x0220),
	DDB_DEVICE_ANY(0x0320),
	DDB_DEVICE_ANY(0x0321),
	DDB_DEVICE_ANY(0x0322),
	DDB_DEVICE_ANY(0x0323),
	DDB_DEVICE_ANY(0x0328),
	DDB_DEVICE_ANY(0x0329),
	{0}
	};

	MODULE_DEVICE_TABLE(pci, ddb_id_table);

	static struct pci_driver ddb_pci_driver = {
	.name = "ddbridge",
	.id_table = ddb_id_table,
	.probe = ddb_probe,
	.remove = ddb_remove,
	};

	static __init int module_init_ddbridge(void)
	{
	int stat;

	pr_info("Digital Devices PCIE bridge driver "
	DDBRIDGE_VERSION
	", Copyright (C) 2010-17 Digital Devices GmbH\n");
	stat = ddb_init_ddbridge();
	if (stat < 0)
	return stat;
	stat = pci_register_driver(&ddb_pci_driver);
	if (stat < 0)
	ddb_exit_ddbridge(0, stat);

	return stat;
	}

	static __exit void module_exit_ddbridge(void)
	{
	pci_unregister_driver(&ddb_pci_driver);
	ddb_exit_ddbridge(0, 0);
	}

	module_init(module_init_ddbridge);
	module_exit(module_exit_ddbridge);

	MODULE_DESCRIPTION("Digital Devices PCIe Bridge");
	MODULE_AUTHOR("Ralph and Marcus Metzler, Metzler Brothers Systementwicklung GbR");
	MODULE_LICENSE("GPL v2");
	MODULE_VERSION(DDBRIDGE_VERSION);